Improvement in machines foe carving in wood



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IsAAo HALL, or NEW Youn, N. Y.

Letters Patent N0. 75,413, daad Mam. 1o, 186s.

IMPROVEMENT IN MACHINES FOR GARVING IN WOOD. l

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TO ALL WHOM IT MAY CONCERN: j

Be it known that I, ISAAC HALL, of the city, county, and State of New York, have invented a new and useful Improvement in Cutting and Carving-Machine; and I do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming parti'of this specification, in which- Figure 1 is a top or plan view of my improved machine.

Figure 2 is a side view of the same.

Similar letters of reference indicate corresponding parts.

My invention has for its object ,to furnish an improved machine, by means of which any desired design or pattern may be cut or car-ved upon ivory, wood, stone, metal, or other suitable substance; and it consists in the construction, combination, and arrangement of the various parts, as hereinafter more fully described and set forth.

A represents the table to which the machine is attached.

B is a frame, securely attached to the table A, and having holes through its bas-e and top bar for the passage of the spindles of the p ivoted frame.

' C is a frame, having spindles, "c .and c2, attached tov its top and bottom bars, which pass through the holes in the base and top bar of the frame B, pivoting the frame C to the said frame B.

Upon the upper end of the spindle c1 is placed the loose drive-pulley D, to which motion is communicated from the power, and also the loose pulley, E, which is rigidly connected to the pulley D, and by which, by means of a band, F, the motion is transferred to the cutter. '.lhe lower end ofthe spindle c" rests upon theshort armv of the lever G, or upon some equivalent connterpoise.

The lever G is pivoted to some suitable support, and has a movable weight suspended from its long arm, so that the pivoted parts of the machi-ne may be exactly balanced.

H is a frame, which slides back and forth within the frame C, and which, when adjusted, is secured in placev `by the set-screws h1, which pass through the' -top bar of the frame C, and press against the shoe or'plate ha,

clamping the frame H between the said plate or shoe and the bottom bar of the said frame C. 4The base or lower horizontal bar of the frame H has a scale or division-marks formed upon it for convenience in adjusting the position of the frame, so that the work may be in the desired proportion to the pattern. The horizontal bars of the frame H project beyond the vertical end bars of said frame atvone or bothlends; and between the said projecting ends are pivoted the swinging frames I and J, by means of set-screws and binding-nuts, as-

shown in fig. 2.

The top barsot the frames I and J, when both frames are used, are connected to each other by the paw allel horizontal bars'K, so that the said frames may always be parallel, however they may be moved about during the progress ofthe work. i

Upon the ends ofthe top bars of the frames I and J are formed upwardly-projecting arms,.z'l 1,'2, jjz, to the upper ends of which are pivoted loose pulleys, Ii, around which pass the bands F; and in one arm of each frame, upon opposite sides of the machine, are formed cutter-holders, the shafts of which pass up through the 'said arms il and jl, and are rigidly connected to the pulleys L, i .I

M are arms, adjustably attached to the top bar of the frame'H by set-screws, passing through slots inthe bases of the said arms, and screwing into the saidiframe, so that the said arms may be adjusted, as required, to

tighten or slacken the bands F. l

To the upper ends of the arms M are pivoted two pulleys, N, between which the bands F pass, as shown in fig. 1.

0 is a horizontal har or arm, formed upon or rigidly attached to the lower part of one of the swinging frames, as I. The bar Ois slotted vertically, as shown in dotted lines in fig. 2', for the reception of the adjusti able tracer; and upon its rear end is formed a handle, o', by means of which the tracer is moved over the pattern- P is a frame or holder, which is secured in place by a. washer and hand-nut, screwinghupon the lower end of a screw attached to the frame P, and passing down through a. hole in the table A, several holes being formed in said table for this purpose, so that the position of said holder may be adjusted as required. The pattern is placed upon the bed-plate p1 of the frame P, where it is secured in place by the slidingblocks p2, which are adjusted by the set-screws p3. v

When the copy is to be of the same size as the pattern, the block may be placed upon the top plate p" of the frame I, where'it is secured in place by the sliding blocks p5, operated by set-screws, as before described. R is a holder, which is secured to the `table A, beneath the cutter of the frame J, and which is scoured in placeby a washer and hand-nut, screwing upon the end of a screw attached to the holder ILYand passing down through a slot in the table A, so that the said holder may have a lateral adjustment. The standard of. the

lholder is made in two parts, sliding vertically upon cach other, and secured in place, when adjusted, by a thumbnut, screwing upon a screw attached to one of said parts, and passing through a slot in the other part. The sliding part of said holder is moved up and down by a set-screw, 7", passing up through the bed-plate et' the standard, and pressing against the end ofthe said sliding part. This gives the holder R a vertical adjustment.

S is the tracer, which is secured in the adjustable socket T by a sot-screw, U, and which, in carving a copy oi' the exact size of the pattern, should be adjusted directly beneath the cutter. In this case, the sliding frame II should be so adjusted that its central point may he exactly in line with the pivoting-points ot' the frame Cl lith this adjustment, two exact copies of the pattern may bc carved at the saine time.

In case it is desired to cut a copy larger or smaller than the pattern, and in exact proportion to it, as, for instance, twice or one-half as large, the frame H must be so adjusted that one or the other of its ends may project twice as far as the other; but, as the cutter and tracer are secured in frames which are also pivoted, a still farther adjustment is necessary to cause the tra er and cutter to describe proportional curves ofiexactly the same form. This-adjustment is effected by moving the tracer outward or inward from the vertical line of the cutter of the frame I a proper distance. To enable this to be done with accuracy, a scale or division-marks are formed upon the bar O, said scale being so formed that, when properly adjusted, the cutter of' the frame J, the pivoting-point of the frames C H, and the tracer S, may all be in the same straight line. These two adjust ments will cause the cutter to describe the curves and outlines of the copy proportional to and of the same form as those ofv the pattern, but the projections and depressions ofthe copy will be of the same height and depth as those ofthe pattern, thus destroying the symmetry of the work. To remedy this, another adjustment is necessary, so thatthe tracer-point, in moving over the pattern, may move vertically through a greater or less space than the cutter in carving the copy, said spaces having the same ratio to each other as the pattern and desired copy. To accomplish this, the tracer is released from its set-screw, so that it may slide freely up and down through its socket; and to its upper end is pivoted the end of a slotted bar, V, the other end of which is pivoted to the upper end of a rod, W, which passes down through and works freely up and down in a socket, X, adjustably attached to the. bar or arm O, and which has a foot formed upon its lower end, which slides over the surface of the table A at the same time that the point of the tracer is passing over the pattern. The middle part of the slotted bar V is pivoted to the upper end ot' the rod Y, which passes down through and is adjustablysecured to the socket Z by a set-screw. i

If the rod Y is pivoted midway between the tracer S and the rod lV, as the tracer S rises land descends in moving over the pattern, the rod W will descend and rise, the said tracer and rod moving through equal spaces in'opposite directions; and,`it` the rod Y is pivoted unequally distant from the tracer S and rod W, the said tracer and rod will move vertically through unequal spaces. This enables the bar V to be so adjusted that the cutter, in carving the copy, shall move vertically through spaces having any desired proportion to the spaces through which the tracer moves in passingover the pattern, so that the copy may be proportional in every respect to the pattern.

If desired, the frame d may be omitted, andthe frameI-I pivoted directly to thc frame B. i In this case, the carving will all be donc by the cutter attached to the frame I, and the tracer will necessarilybc placed in the same vertical line with said cutter, so that-the copies must all be of the same size as the patterns.

I claim as new, and desire to secure by Letters Patent-' 1. The combination of one or more pivoted or swinging frames, I J, constructed substantially as herein shown and described, with the pivoted frame H, as and for the purpose herein set forth.

2. The frame H, adjustable with relation to the pivoting-frame C, for the purpose ot' carving two exact copies of the pattern at the same time, or increasing or diminishing the size ofthe copy in exact proportion to the pattern, substantially as herein shown and described.

3. The tracer S, adjustably secured to the slotted bar or arm -O of the swinging or pivoted frame I by means of the slotted bar V, rods IV Y, and sockets T Z X, substantially as herein shown and described, and for the purpose set forth. y i.

4. The combination of the slotted bar V, pivoted rod W, and adjustable pivoting-rod Y, with each other and with the tracer Sv and slotted bar or arm O of the pivoted frame I, substantially as herein shown and described, and for the purpose set forth.

The combination and arrangement of the pulleys L und N with thc pivoted frame or frames I and J, frame II, and driving-pulleys D E, for the purpose of keeping the band or bands F taut while operating 'thc cutters, whatever may be the relative positions of the said frames, substantially as herein shown and described.A

6. The arrangement ofthe holder and frame I with relation to the pivoted frame I, tracer S, and cutter in the arm z', substantially as described, for the purpose specified.

The above specification of my invention signed by me, this Ist day of August, 1867.

ISAAC HALL.

Witnesses JAMES T. GRAHAM, ALEX. F. Ronnnrs.4 

